ASTM D7472-09

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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Designation:D7472 −09
StandardSpecification for
EFEP-Fluoropolymer Molding and Extrusion Materials
This standard is issued under the fixed designation D7472; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope D3418 Test Method for Transition Temperatures and En-
thalpies of Fusion and Crystallization of Polymers by
1.1 This specification covers melt processible molding and
Differential Scanning Calorimetry
extrusion materials of EFEP-fluoropolymer. The EFEP resin is
D3892 Practice for Packaging/Packing of Plastics
a copolymer of ethylene, tetrafluoroethylene, and hexafluoro-
E177 Practice for Use of the Terms Precision and Bias in
propylene.
ASTM Test Methods
1.2 This specification does not cover blended materials and
IEEE/ASTM SI-10 Use of the International System of Units
does not cover recycled materials.
(SI): The Modem Metric System
1.3 The values stated in SI units as detailed in IEEE/ASTM
2.2 ISO Standards:
SI-10 are to be regarded as the standard. The values given in
ISO 12086-1 Plastics—Fluoropolymer Dispersions and
parentheses are for information only.
Moulding and Extrusion Materials—Part 1
ISO 12086-2 Plastics—Fluoropolymer Dispersions and
1.4 The following safety hazards caveat pertains only to the
Moulding and Extrusion Materials—Part 2
test method portion, Section 11, of this specification.This
standard does not purport to address all of the safety concerns,
3. Terminology
if any, associated with its use. It is the responsibility of the user
of this standard to establish appropriate safety and health 3.1 General—The terminology given in Terminology D883
practices and determine the applicability of regulatory limita- is applicable to this specification.
tions prior to use.
3.2 Definitions:
3.3 lot, n—one production run or a uniform blend of two or
NOTE 1—Although this specification and ISO 12086-1 and
ISO 12086-2 differ in approach or detail, data obtained using either are
more production runs.
technically equivalent.
3.4 General—The abbreviated terms given in Terminology
D1600 are applicable to this specification.
2. Referenced Documents
2.1 ASTM Standards:
4. Classification
D150 Test Methods forAC Loss Characteristics and Permit-
4.1 This specification covers two types of fluoropolymer
tivity (Dielectric Constant) of Solid Electrical Insulation
supplied in pellet form classified according to their melting
D618 Practice for Conditioning Plastics for Testing
points. The resins of each type are divided into one to two
D638 Test Method for Tensile Properties of Plastics
grades in accordance with their melt flow rate.
D792 Test Methods for Density and Specific Gravity (Rela-
tive Density) of Plastics by Displacement
4.2 An one-line system shall be used to specify materials
D883 Terminology Relating to Plastics
covered by this specification. The system uses predefined cells
D1238 Test Method for Melt Flow Rates of Thermoplastics
to refer to specific aspects of this specification, as illustrated as
by Extrusion Plastometer
follows:
D1600 Terminology forAbbreviatedTerms Relating to Plas-
Specification ___________________________
tics Standard Number : Type : Grade : Special
Block : : : Notes
:: :,:
Example: Specification D7472 - 09, I2
This specification is under the jurisdiction of ASTM Committee D20 on
Plastics and is the direct responsibility of Subcommittee D20.15 on Thermoplastic For this example, the line callout shall be, Specification
Materials.
D7472 – 09, I2 and shall specify a fluoropolymer that has all of
Current edition approved June 1, 2009. Published June 2009. DOI: 10.1520/
the properties listed for that type and grade in the appropriate
D7472-09.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Standards volume information, refer to the standard’s Document Summary page on Available from American National Standards Institute (ANSI), 25 W. 43rd St.,
the ASTM website. 4th Floor, New York, NY 10036, http://www.ansi.org.
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D7472−09
TABLE 1 Specific Gravity, Melting Point, and Flow Rate
Use clean aluminum foil, 0.13 to 0.18 mm (0.005 to 0.007 in.)
Requirements
thick, in contact with the resin. Spraying a high-temperature
Type I II
mold release agent on the aluminum foil will help prevent the
Grade 1 2 1
foil from sticking to the sheet. Use steel molding plates at least
Specific gravity,
1.0mm(0.040in.)thickandhaveanareaadequatetocoverthe
min: 1.71 1.71 1.71
max: 1.77 1.77 1.77
chase.
Melting point, °C,
min: 155 155 190 8.2 Lay down and smoothly cover one plate with a sheet of
max: 170 170 200
aluminum foil. Place the mold chase on top of this assembly.
Flow rate, g/10
Place within the mold chase sufficient molding material to
min,
min: 25.0 3.0 20.0
produce the required sheet in such manner that the polymer
max: 50.0 8.0 30.0
charge is a mound in the middle of the chase. Place a second
sheet of aluminum foil on top of the granules and add the top
mold plate. Place the assembly in a compression molding press
specified properties, or tables, or both, in the specification
having platens that have been heated to 265 6 5°C (509 6
identified. A comma is used as the separator between the
9°F).
standard number and the type. Separators are not needed
8.3 Bring the press platens to incipient contact with the
between the type and grade.
mold assembly. Hold for 2 to 4 min without pressure. Apply
approximately 1 MPa (145 psi) and hold for 1 to 1.5 min.Then
5. General Requirements
apply 2 to 4 MPa (290 to 580 psi) and hold for 1 to 1.5 min.
5.1 The material shall be of uniform composition and so
Maintain the press at 265 6 5°C (509 6 9°F) during these
prepared as to conform to the requirements of this specifica-
steps. Remove the assembly from the press and place between
tion.
two 20 6 7-mm (0.75 6 0.25-in.) steel plates whose tempera-
5.2 The material described in this specification shall be free
ture is less than 40°C (104°F).
of foreign matter to such a contamination level as shall be
8.4 Whenthesheetiscoolenoughtotouchabout50to60°C
agreed upon between the purchaser and the seller.
(122 to 140°F), remove aluminum foil from the sheet. (If the
sheetisallowedtocooltoroomtemperature,thealuminumfoil
6. Performance Requirements
cannot be pulled free.)
6.1 The average test result of the lot shall conform to the
requirements prescribed in Tables 1 and 2 when tested by the
9. Conditioning
procedures specified herein. Table 2 lists those tests requiring
9.1 For tests of specific gravity and tensile properties,
a specimen molded as described in Section 8.
condition the molded test specimens in accordance with
Procedure A of Practice D618 for a period of at least 4 h prior
7. Sampling
to test. The other tests require no conditioning.
7.1 The materials shall be sampled in accordance with an
9.2 Conduct tests at the standard laboratory temperature of
adequate statistical sampling program.
23 6 2°C (73.4 6 3.6°F) for
...